Herman bbhe



H BEHR Machine for Shaking Screens.

(No Model.)

Patented Jan. 18, 1881.

mi, mfiM/ m r W V NJETERS. FHOYO-LITHOG UNITED STATES PATENT OFFICE.

HERMAN BEHR, OF BROOKLYN, NElV YORK.

MACHINE FOR SHAKING SCREENS.

SPECIFICATION forming part of Letters Patent No. 236,697, dated January 18, 1881.

Application filed July 16, 1880. (No model.)

To all whom it may concern Be itknown that l, HERMAN BEHR, of Brooklyn, in the county of Kings and State of New York, have invented a new and useful Improvement in Machinery for Shaking Screens and the like, of which the following is a specification.

In the drawings, Figure 1 is a vertical section of my improved machine. Fig. 2 is a front elevation thereof, partly in section.

Heretofore screens have been shaken by machinery of the kind adapted to push the screen against a spring, whose recoil drove the screen back afterthepushingforcehad reached its limit, the repetition of this movement causing a continuous shaking. Such machinery is, however, very apt to get out of order, 0win g to the great friction caused by the positive contact-surfaces.

My invention is an improved machine 'for skaking screens and the like; and it consists in the combination of a fixed frame with a vibrating spring-frame, to which a vibratory or shaking motion can be readily imparted by a system of shafts and belting and weights, as hereinafter described.

Referring 'to the drawings, A is a solidlyfixed frame-work or base, through which runs the horizontal shaft B, revolved by suitable machinery, and provided with a fly-wheel, b, and having upon it a pulley, 0. Upon the base A, and so that it stands firmly thereon, is set the upper frame, 0. This'frame O is made of thin/wood or metal strips, set into the base A at d and e, and of sufficient flexibility to easily swing from one side to the other, and joined together by cross-pieces f and g or otherwise. Through the upper portion of the frame 0 runs a horizontal shaft, D, having upon it a pulley, 1'. Over the pulleys i and c is passed a belt, is. To the shaft D are fastened eccentric weights l I, one or more, which. in revolving, shift the center of gravity, and serve thereby to unequally strain the flexible or spring frame 0, causing it to swing to and fro. The upper end, on, of the said springfra me G is suitably connected with the screen or other device to be shaken.

The operation of my machine is as follows: \Vhen the shaft B is revolved the motion is communicated by the belting L" to the upper shaft. The movement and strain resulting from the turning of the eccentrically-weighted shaft cause the upper frame, 0, to vibrate in the desired manner. By suitably connecting the upper end, m, of the frame 0 with a screen or screens or the like which it is desired to shake, the oscillations of the end m will be communicated to the screens, shaking them also.

The weights may be adjusted on the shaft D, to vary the degree and rapidity of the oscillation.

I claim- I In a machine for shaking screens and the like, the combination of the frame A, having the shaft B, with the spring-frame 0, having shaft D, and with the eccentric weights ll thereon, substantially as and for thepurposes described.

HERMAN BEER.

Witnesses:

WILLY G. E. SCHULTZ, SAML. R. BETTS. 

